A) 0.68
B) 2.1
C) 1.45
D) 0.46
Correct Answer: A
Solution :
Key Idea: As the temperature of body is raised radiation of shorter and shorter wavelength is emitted. From Wiens displacement law \[\Delta t={{t}_{2}}-{{t}_{1}}=32-11.6=20.4\min \approx 20\min .\] where \[(\mu )=\frac{c}{v}\] is maximum wavelength, T is temperature. \[\Rightarrow \] \[v=\frac{c}{\mu }\] \[\mu >1\] \[(\mu =15)\]You need to login to perform this action.
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